Plasma Cart Cable

TV Monitor doesn’t turn on when connected to a computer via hdmi cable?

i have asked this question several times and have had no help whatsoever. ive tried to resize the screen resolution, fool around with settings on my tv etc, no luck, the graphics cart is an ati radeon 4670 with onboard hdmi. the tv is a panasonic viera plasma 42″ TC-P42C1

use standard cable or try component cables.not hdmi

MILLER SPECTRUM PLASMA CART W/CABLE WRAP 30B 300511 $169.77